SYSTEM OPERATION
EXPANSION VALVE/CHECK VALVE ASSEMBLY | EXPANSION VALVE/CHECK VALVE ASSEMBLY |
IN COOLING OPERATION | IN HEATING OPERATION |
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Most expansion valves used in current Amana® Brand Heat Pump products
use an internally checked expansion valve.
This type of expansion valve does not require an external check valve as shown above.
However, the principle of operation is the same.
RESTRICTOR ORIFICE ASSEMBLY | RESTRICTOR ORIFICE ASSEMBLY |
IN COOLING OPERATION | IN HEATING OPERATION |
In the cooling mode, the orifice is pushed into its | In the heating mode, the orifice moves back off its |
seat, forcing refrigerant to flow through the metered | seat, allowing refrigerant to flow unmetered around |
hole in the center of the orifice. | the outside of the orifice. |
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